Assigns a generated ID to the selected element.
The ID value assigned to the selected element is based on the current date and time (composed from values representing the year, month, day, hours, minutes, seconds, plus two randomly generated values). It is designed to be unique per user for 100 years. You can specify an ID prefix in the Options dialog. If you specify a unique ID prefix for each user, the generated IDs will be unique for each member of your team.